WOOD EFFICIENCY
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The key I am looking at here is turning your money (wood) into a heated home.

WOOD STOVE style and function in one, like no other!!

So you can have a wood stove that on paper has an efficiency of 90% but if only 10% is entering the house and 80% go’s out the flue, that fire is only:

10% WOOD EFFICIENT!

So you could have a fire that is 50% efficient on paper, smokes like hell, makes heaps of ash stinks, but if 45% of the heat is entering the house and 5% is going up the flue, it is much more WOOD EFFICIENT! Shocking but true!

Things one can do to increase wood efficiency.

Basics:

  • Install a fan in the room to push hot air down; this will help have the heat in the occupied area.
  • Install a fan to blow air over the fire. Not some little silly thing that sits on top, but one that will cool the out side of the fire and heat the room.
  • Back and bottom should have heat reflecting covering, especially if it is on an out side wall.

Technical

  • Flue radiators and heat exchanges. This is to get as much heat out of the flue gas before it leaves the building.
    • There are some things that need to be addressed to make this work. (do not use lined flue inside the building.)
    • Heat need to be removed to the point where the fire, will no longer work properly and stalls, then go back a bit or install a flue fan.
    • Flue condensate traps will have to be installed to remove condensation in the flue.
    • Flue insulation will have to be added to flue sections, in areas where heat would be lost to the out side, this will help flue draft/ draw.
    •  Do not have your flue lined, this is especially relevant if the flue stack ins in the middle of the building. What you want is to use the flue stack as a heat sink, like on a "rocket stove"
    • Or have a back boiler and move the heat in to a tank.
    • burn fast and hot, not smolder. (over night burn with wood is a fallacy)
    • only use out side air directly into the stove.
    • And then keep the door shut.
    • Obviously only seasoned wood.
    • keep flue swept, so the heat can be utilized , as soot is an insulator.
    • the little thermoelectric stove top fans are great but don't be afraid to put a fan powered by the mains on the back or sides to help.
  • if you are looking to put in "under floor heating" consider using the concert mass as your heat sink for your fire, using water as the medium to get the heat into the mass and then out to radiators upstairs.

 

 

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